Packing for shafts



March19, 1929. v. E. NELSON 1,706,181

PACKING FOR SHAFTS Filed July 27, 1925 A TTORNEY.

25 fully described and claimed and the Patented Mar. 19, 1929.

UNITED STATES I 1 1,706,181 PATENT OFFICE.

VICTOR E.- NELSON, OF PONTIAC, MICHIGAN.

Home FOR SHAFTS.

Application filed I111y27, 1 925. Serial No. 46,331.

This invention relates to packing for shafts, and the object of the invention-1s to provide a packing adapted to prevent grease or oil leakage along a shaft and arranged to pack the shaft even when there ls side play and end play of the shaft.

Another object of the lIlVGIltlOlliS to provide a packing for shafts inwhich the packing is held from rotation, while the shaft is rotatable therein and in WhlCh the packing may move with the shaftif the shaft has any side play.

Another object of the invention is to provide a packing for shafts in which the packing is mounted in a casing and 1s ada ted to pack thecasing wall to prevent lea a e about the packing as well as along the shaft.

A further object of the invent on is to provide a retainer for the packing ring adapted to maintain a tension on the packing ring all times. a

These objects and the several novel features of the invention are hereinafter more referred form of construction by which t ese objects are attained is shown in the accompanying drawings in which- Fig. 1 is a section through the end of a transmission housing showlng my.-packing as utilized therewith. V

, F Fig. 2 is a section taken on line 2-2 of 1g. Fig. 3 is a perspective view of the retaine for the packlng ring. V Fig. 4 is an enlarged section taken on line Jr-4: of Fig. 2.-

As shown in Fig. 1 a cup shaped cap 1 is secured to the transmission housing 2 by the bolts 3. The cup shaped cap 1 is provided with an aperture 4 at the center slightly larger than the shaft 5 and. a cup shaped casing 6 is pressed into the cap 1 to form a chamber 7 between the casing 6 and the cap 1. A packing ring 8 made of cork or other, suitable packing material is positioned within the chamber 7 and a cup shaped sheet metal retainer- 9 is positioned over-the packing ring 8 as shown in Fig. 1. The retainer 9 is provided with an outwardly extending Z in the casing 6 which is slightly larger than the diameter of the shaft 5. The retainer 9 as shown in Figs. land 3 is provided with to hold it in packing position at! lug 10 shown in Figs. 1, 2 and 3 which exthree spring lugs 13 struck up from the body of the retainer and these spring lugs '13 as shown in Fig. 1 are adapted-to engage the inner wall of the casing 6 and the tension of these lugs forces the packing ring 8 into engagement with the inner face of the cap 1. As shown in Figs. 3 and 4 the retainer' 9 is rovided with depressions 1 1 which extend into the packing ring 8 and thus hold the-packing ring in fixed relation with the retainer.

By means of the lug 10 extending through the notch 11 the retainer 9 is held from rotation and by means of the depressions 14L the packing ring 8 is also held from rotation. This packing ring 8 closely fits the shaft 5 and prevents leakage along the shaft and by means of the. springprongs or In s 13 on the retainer, the packing ring is he (1 in engagement with the inner face of the cap 1 and prevents leakage about the pack ing ring and between the cap 1 and packing ring. Should there be any side play of the shaft 5 the packing ring is moved in its plane by the. shaft and continues to pack the inner face of the ca and the shaft 5 which rotates in the pac ing ring 8. Theaperture 4. for the shaft 1 and the aperture 12 in the casing 6 are slightly larger than the diameter of the shaft 5 so that side play of the shaft will not damage these parts and the notch 11 is .made of sufficient depth to allow movement of the retainer lug 10 and packing ring with the shaft 5.

From the foregoing description it becomes evident that the device is very simple andv provided with an aperture for the shaft of greater diameter than'the shaft, a casing secured in the cap and forming a chamber between the casing and cap, the casing bein provided with an aperture through whic the shaft extends and with a notch opening into the said aperture, a packing ring positioned within the saidchamber and closely fitting about the shaft, a cup shaped retainer fitting over the packin ring and having an aperature for the shaft, a series of spring lugs struck up from the body of the retainer and riding in contact with the inner face of the casing, the spring lugs forcing the packing ring into engagement With the inner .face of the cap about the aperture for the shaft, and a lug extending from the retainer and engaging in the notch of the casin 2. packing for shafts .comprising the combination with a shaft and its bearing and housing therefor, of a cap having a lateral flange secured to the housing and provided with an aperture for the shaft of greater diameter than the shaft, a casing.

secured in the cap and forming a chamber between the casing and cap, the casing be-' ing provided with an aperture through which the shaft extends and with a notch opening into the said aperture, a packing ring positioned within the said chamber and closely fitting about the shaft, a cup shaped retainer fitting over the packing ring and having an aperture for the shaft, the retainer being provided with a series of depressions extending into the packing ring and preventing rotation of the packing ring relatlve to the retainer, a series of spring lugs struck up from the body of the retainer and riding in contact With the inner face tion. v v

- VICTOR E. NELSON. 

